CVE-2024-50211

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On situations like ftruncate, udf_extend_file() can now\ndetect errors and bail out early without resorting to checking for\nparticular offsets and assuming internal behavior of these functions."}], "metrics": [{"cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.8, "baseSeverity": "HIGH"}, "scenarios": [{"lang": "en", "value": "AV:L - Exploitation requires local access to mount a crafted UDF filesystem image (loop device, USB stick, or optical disc) and then issue an ftruncate()/truncate() syscall against a file on it. There is no remote or network-facing path into fs/udf.\nAC:L - The attacker fully controls the on-disk UDF metadata (indirect extent chains, lengthAllocDescs, extent locations pointing past device capacity) that forces udf_next_aext() into its error paths, and syzbot produced a deterministic C reproducer; no race and no uncontrollable memory-layout precondition is involved.\nPR:L - On mainstream Linux desktops an active unprivileged user can loop-setup and mount a crafted UDF image via udisks2/polkit (allow_active by default) or have removable UDF media automounted, and only ordinary write access to a file is needed to call ftruncate(); no real root in the initial namespace is required in that deployment.\nUI:N - The attacker performs both steps \u2014 supplying/mounting the image and issuing the ftruncate() \u2014 with no action by any other user in the unprivileged-loop-mount scenario.\nS:U - The out-of-bounds read and write occur in kernel slab memory within the same security authority; no VM, IOMMU, or sandbox boundary is crossed.\nC:H - The confirmed KASAN slab-out-of-bounds read pulls adjacent kernel heap contents into extent.extLength/extLocation, which are then written into the file's allocation descriptors on the attacker-readable image and used as block addresses, disclosing kernel memory and arbitrary device blocks.\nI:H - The same corrupted extent_position flows into udf_write_aext()/__udf_add_aext(), which write an 8\u201316 byte allocation descriptor through an unchecked ptr = i_data + epos->offset - alloc_offset + lenEAttr, giving an out-of-bounds slab write with attacker-influenced offset and data \u2014 a heap corruption primitive suitable for control-flow hijacking.\nA:H - The out-of-bounds access reliably produces a KASAN/oops kernel crash, and the corrupted i_lenExtents plus huge computed new_elen drive udf_do_extend_file() into unbounded extent creation, so an unprivileged local user can panic or hang the system."}]}], "affected": [{"product": "Linux", "vendor": "Linux", "defaultStatus": "unaffected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/udf/directory.c", "fs/udf/inode.c", "fs/udf/partition.c", "fs/udf/truncate.c", "fs/udf/udfdecl.h"], "versions": [{"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "493447dd8336607fce426f7879e581095f6c606e", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "b22d9a5698abf04341f8fbc30141e0673863c3a6", "status": "affected", "versionType": "git"}, {"version": "1da177e4c3f41524e886b7f1b8a0c1fc7321cac2", "lessThan": "c226964ec786f3797ed389a16392ce4357697d24", "status": "affected", "versionType": "git"}]}, {"product": "Linux", "vendor": "Linux", "defaultStatus": "affected", "repo": "https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git", "programFiles": ["fs/udf/directory.c", "fs/udf/inode.c", "fs/udf/partition.c", "fs/udf/truncate.c", "fs/udf/udfdecl.h"], "versions": [{"version": "2.6.12", "status": "affected"}, {"version": "0", "lessThan": "2.6.12", "status": "unaffected", "versionType": "semver"}, {"version": "6.6.59", "lessThanOrEqual": "6.6.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.11.6", "lessThanOrEqual": "6.11.*", "status": "unaffected", "versionType": "semver"}, {"version": "6.12", "lessThanOrEqual": "*", "status": "unaffected", "versionType": "original_commit_for_fix"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.6.59"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.11.6"}, {"vulnerable": true, "criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "versionStartIncluding": "2.6.12", "versionEndExcluding": "6.12"}]}]}], "references": [{"url": "https://git.kernel.org/stable/c/493447dd8336607fce426f7879e581095f6c606e"}, {"url": "https://git.kernel.org/stable/c/b22d9a5698abf04341f8fbc30141e0673863c3a6"}, {"url": "https://git.kernel.org/stable/c/c226964ec786f3797ed389a16392ce4357697d24"}], "title": "udf: refactor inode_bmap() to handle error", "x_generator": {"engine": "bippy-1.2.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 3.3, "attackVector": "LOCAL", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "integrityImpact": "NONE", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "LOW", "privilegesRequired": "LOW", "confidentialityImpact": "NONE"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2024-50211", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "version": "2.0.3", "timestamp": "2025-10-01T20:17:19.011673Z"}}}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "description": "CWE-noinfo Not enough information"}]}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2025-10-01T20:27:05.842Z"}}]}}

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On situations like ftruncate, udf_extend_file() can now\ndetect errors and bail out early without resorting to checking for\nparticular offsets and assuming internal behavior of these functions."}, {"lang": "es", "value": "En el kernel de Linux, se ha resuelto la siguiente vulnerabilidad: udf: refactorizar inode_bmap() para controlar el error Refactorizar inode_bmap() para controlar el error, ya que udf_next_aext() ahora puede devolver un error. En situaciones como ftruncate, udf_extend_file() ahora puede detectar errores y salir antes sin recurrir a la comprobaci\u00f3n de desplazamientos particulares y asumir el comportamiento interno de estas funciones."}], "id": "CVE-2024-50211", "lastModified": "2026-08-04T11:21:33.197", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.3, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "LOW", "baseScore": 3.3, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2024-50211", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2025-10-01T20:17:19.011673Z", "version": "2.0.3"}}]}, "published": "2024-11-08T06:15:17.410", "references": [{"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/493447dd8336607fce426f7879e581095f6c606e"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/b22d9a5698abf04341f8fbc30141e0673863c3a6"}, {"source": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "tags": ["Patch"], "url": "https://git.kernel.org/stable/c/c226964ec786f3797ed389a16392ce4357697d24"}], "sourceIdentifier": "416baaa9-dc9f-4396-8d5f-8c081fb06d67", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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{}